The Cisco Infrastructure group is for the discussion of technical issues that arise during the implementation, administration, or daily use of Cisco networking products such as WAN, LAN, Switching, Routing, and Network Management.

Hi Dears
We have cisco 2811 that connect to tellabs 8110 cte-s via wic-1t to interanet (leased line) network.
I configured cisco serial port "IP Unnumberd " by other fast ethernet interface 0/0 witch is connect to our lan and also set PPP as serial encapsulation - LINE LED on tellabs is continuously on and other LED's are off .but the result of " show ip interface brief " is serial line up protocol DOWN
my questions:
1- NOTE: this line has never worked so it maybe a problem beside of Service provider . isn't it ?
2- i change encapsulation to HDLC but it never mind.
3- i substitute v.35 to wic-1t cable with other one that worked in production network

Left alone LED shows the power of device. right side two led is there . One
is PMA and another DMA. PMA indicates the status of Line and protocol and
DMA indicates the status of device. So now check the PMA is continuous. and
after that check the line protocol by getting the loop from ISP. They are
shorting the line on DIVA CARD at there exchange.so that you can get the
loop .

Left alone LED shows the power of device. right side two led is there . One
is PMA and another DMA. PMA indicates the status of Line and protocol and
DMA indicates the status of device. So now check the PMA is continuous. and
after that check the line protocol by getting the loop from ISP. They are
shorting the line on DIVA CARD at there exchange.so that you can get the
loop .

As you discussed your line LED is continuously on and PMA and DMA is off. So
you have to ask to ISP for Loop So that you can check the line voltage. As i
understand your connection is point to point but your ISP has not terminated
your connection on proper point. if your router serial port status is up and
line protocol is also up then it is the problem of ISP. and i think so it is
termination issue of line from exchange.

Your connection is going properly to your near exchange but after your ISP
exchange it will have to go to central distribution section where
connections are decided to be terminated . Problem is there. So your line is
up but connection is not working.Kindly contact to reference person of ISP
(mostly though which you taken the connection ).

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